Ozone generator



F. E. HARTMAN OZONE GENERATOR Dec. l, 1931.

Filed Feb. 14

fill? ZAv . Z 5 WMA l@m Fatented Dec. ll*9` i931 FRANK E. HARTMAN, or' CHICAGO, ILLINOIS, ASSIGNOH or' ONE-THIRD 4'ro FRED H. MONTGOMERY- AND ONE-THIRD "ro w. RAY MONTGOMERY, BOTH or CHICAGO,

ILLINOIS OZONE GENERATOR Application mearebmary 14,*13o. sel-iai N0.-42s,2s3.

. ly cooled so as to preventits temperature from rising toa point where catalytic decomposition of ozone occurs in which the-outer electrode is placed on the outside of the tubular.,

dielectric, and the inner electrode is tubular, and both are mounted so they can be quie :ly and conveniently removed and polished to prevent sparking in the ozone producing discharge. which will produce oxides of nitrogen and local high temperatures and 'tendzto bring about th destruction of the dielectric material and 'exert` a destructive eect uponv the ozone produced; which is simple 1n cony struction andwcan be produced at a low cost; in

whichla corrugated metal sheet performs the f functionofyaiheat conductor, from the outer electrode on vlthe dielectric to the wall of the casing to cool the dielectric, and also functions'to yieldingly hold the dielectric conceni trically around the inner electrode in such manner as to' permit'unequalexpansion and contraction of the metal parts and the `dielectric and to provide for commercial inequalities or variati-onsi'n the thickness of the glass walls of the dielectric; in which both elec,-

trodes andl the dielectric can be conveniently removed without disconnecting the air and water yconnections with the casing, to permit replacement of the dielectric; in which the packing boxes for the tubular dielectric are dispensed with; which is ada-ptedto be used, either with .or Without a water jacket; and which can be manufactured ata low cost and is efiicient in operation.l j

, The invention consists'in the several novel features hereinafter set forth'and more particularly defined by claims at the lconclusion hereof. In the drawings: Fig. 1 is a vertical central section of an ozone generator embodying the invention. Fig. 2 isa section on line'Q-Z of Fig. l; Fig. 3 is a side elevation. Fig. 4 `is an elevation of a portion of the dielectric and the corrugated radiator.

The inventionis exemplified in a. generator provided with a casing-consisting of a lower head 5,'an upper head 6, and a tube 7 extending vertically between the heads and term'inating in annular recesses 5a and 6a in the is formed inthe upper head 6 and is adapted y for connection toa pipe for deliveringthe air to be ozonized' into the generator. An outlet duct 9 for-,the ozonized air is formed in the lower head'j.

A tubular dielectric l0 of suitable material7 such .as glass, and'substantially cylindrical from end to end, has its lower end resting on a. lead gasket 5f in the bottomdof the recess 5a in head 5, The upper end of the dielectric terminates in the chamber 6 inlthe upper.

head C, and both ends are free or `left unclamped to permit expansionand contraction Of the dielectric in the casing.

' A' coating of suitable metal is stitutes a tubular outer electrode-11' of the generator, and with the dielectric constitutes a combined electrode and dielectric. A mem-A ber 12, formed of copper sheet or other suitable heat conducting metal is vertically corrugated from end to end and extends anlnularly and lits between the inner periphery of the cylindrical wall 7 and the outer periphery of the velectrode 11 on the delectric 10. This corrugated member is sutliciently resilient to Contact with the outer' heads respectively. These heads and. tube 7 deposited on the outer periphery of the dielectric and conperiphery of electrode 11 and inner periphf ery of Wall 7, so as tO eiiiciently conduct heat from the electrode 1'1 and the dielectric to the wall 7 and to permit the unequal expan sions of the dielectric and the nietal of the which tendto rupture the dielectric mate.

rial. The corrugated member 12 is split or open longitudinally7 as at 13, to provide the desired degree of resiliency. Besides functioning as a heat radiator, corrugated member 12 Serves to position'the dielectric and the outer electrode 11 carried thereby concentrically around the inner electrode and in the casing. To permit the easy removal of the tubular dielectric and the electrode 11,

15 an opening is formed in the'upper end of head 6 which is closed by the cap 15 which is removably secured to said head by screws 16. This construction permits a dielectric to be removed and replaced withoutrequin ing disconnection of the pipes connected to the casing. rll`he gasket 5c of lead is secured' in the head 5, to engage the lower end of the dielectric, and prevents the`passage of air from the polar space inside of the dielectric to the space between the outer electrode and wall 7.

The inner electrode 17 consists of a tube of suitable material, such as aluminum.k rlhe upper end of electrode 17 is pressed tightly 3o around'an upper aluminum ring 18, and the lower end of which is contratedand pressed around an aluminum ring 19. Each of these rings is chambered or` recessed, as at 20, to receive one end of an insulator tube for supporting the inner electrode from the heads 5 and 6 respectively. These recess/es are adapted to receive a suitable cementh 21 for Securing the insulators to the ends of the Y, electrodes. An insulator 22, which is 'tubularV 40 from end to end, extends through the cap 15 and the upper end of the dielectric and to the ring 18, where it is secured to said ring and `the upper end of the inner electrode 17. An

' insulator 23, also tubular from end to end, extends through the lower head 5 and the lower end of the dielectric into ring 19 where it is'secured to said ring. These insulators are made of porcelain, and cement 21 has sufl icient dielectric strength not to permit sliding sparks between the ends of the inner electrode and the heads ofthe casing. Insulator ,23 extends through a packing box 24 in the lower -head 5,v and insulator 22 extends" trode to a suitable conductor through which j electric current is'supplied to the generator. The return conductor may be secured to either of the heads 5 or 6 to return the current from the outer electrode, the corrugated l member 12 being of conducting material and ficiently to prevent sliding sparks at or to insulate the boundaries of the electrodes. rlf'he upper/end of the dielectric is extended so it can be grasped and passed through open- .ing 14 in cap'` 15.v f

j water jacket is formed around the'tubular wall 'a' of the casing and between the heads 5 and 6. Thisjacketis formed by'a tube 30 and rings 31 which arepressed and secured ron the tube 30, and are provided with grooves 32-for the endsA ot' tube 3() and packings 33. nnular. glands 34, slidable on tube' 30, are provided to compress the packings around said tube. Cap screws 35, passing through ears 36 on heads 5 and 6 respectively, .are

`threaded into rings 31 respectively to jam the ends of tube 7 in said heads and form tight ointsbetwecn the ends of the tube and said heads for preventing air from leaking from the casing. Bolts 3? pass through ears on the glands 34, and rings 31 and are provided withnuts 38 for adjusting the glands to compress ythe' packings and with nuts 39 for engaging the rings to preventl excessive tightening of the screws 35 from loosening the lrings 31 on the tube 30. The space between tubes and 30 and rings 31 is adapted tol receive water through an'inlebduct 40 in the lower ring 31, which is adapted for connection to a supply pipe.l An outlet duct 41 is formed in the upper ring 31, and is adapted for connection to a discharge pipe. The construction described permits the packings 33 to be adjusted and replaced without disturbing the water connections with rings 31. lVhile the invention has been illustrated with a water jacket, it will be understood that the tube 30 and glands 34 `may be omitted, so that the tube 7 air.

The inventionexemplifies a tubular ozone generator in which both electrodes can be conveniently removed from the casing without disturbing either the air or water connec- ,of importance in facilitating the replacement of a ruptured dielectric. The invention may be cooled byl also exemplifies a generator of this type in which the boundaries of the electrodes are protected against sliding sparks. The invention'also exemplifies a generator in which the dielectric consists of ay cylindrical glass ,which is supported inthe casing without .clampsfor packing boxes, so that all portions thereofare free to expand and contract responsively to heat changes without danger' of breaking the glass. .The corrugated tubular stricted to the details set forth, since these may be modified within the scope of the appended claims, without departing fromthe spirit and scope of the invention.

Having thus described the invention, what l claim as new and desire to secure by Letters Patent, is:

1. lin an ozone generator, the combination of a tubular dielectric, an outer electrode on the periphery of the dielectric, an inner tubular electrode spaced from the outer electrode, and. a tubular heat conductor of sheet metal extending longitudinally between and conl, tacting with the metal Wall and the outer electrode.

2. ln an ozone generator, the combination of a tubular dielectric, an outer electrode on the periphery of the dielectric, an inner tubular electrode spaced from the dielectric, a casing comprising a tubular metal wall spaced from the outer electrode, and a re; silient heat conductor of sheet metal' extending longitudinally between and contacting with the metal wall and the outer electrode.

3. lin an ozone generator, the combination of a tubular dielectric, an outer electrode on the periphery of the dielectric, an inner tubular electrode spaced from the dielectric, a casing comprising a tubular metal wall spaced from the outer electrode and a heat conductor of corrugated metal extending longitudinally between and contacting with the metal wall and the outer electrode.

4. lin an ozone generator, the combination of a tubular dielectric, an outer electrode on dielectric, the dielectric being supported onk .electric spaced from the inner electrode, an

' and a Water-jacket around said wall.

5. In an ozone generator, the combination of a.tubular dielectric, an outer electrode on the outer periphery of the dielectric, an inner tubular electrode spaced from the dielectric, a casing comprising a tubular metal wall spaced from the outer electrode, a resilient heat conductor of corrugated sheet metal extending longitudinally between and bent to contact with'the inner periphery of the metal wall and the outerperiphery of the electrode, and a water-jacket around the wall.. 6. In an ozone generator, the combination of a tubular dielectric, an outer electrode on the outer periphery of the dielectric, an inner tubular `electrode spaced from the di! electric, a casing comprising a tubular metal wall spaced from the outer electrode, and a corrugated tubular resilient member extending longitudinally between and bent to contact with the inner periphery of the metal wall and the outer periphery of the electrode. 7. In an ozone generator, the combination of tubular inner and outer electrodes, a removable tubular dielectric spaced from the inner electrode, a casing comprising a tubular wall, and provided witha rest for the lower end of the dielectric, the dielectric being supported on said rest with all portions thereof. free to expand and contract, :ind resilient means around the outside of the dielectric for concentrically positioning the dielectric around the inner electrode.

8. In an ozone generator, the combination of inner and outer tubular electrodes, a tubular dielectric spaced from the inner electrode, a casing comprising a tubular wall, and pro vided with a rest for the lower end of the 305 said rest with all portions thereof free to expand and contract, and a corrugated resilient member-engaging said wall, for centering the dielectric around the inner electrode. i

9. In an ozone generator, the combination of tubular inner and outer electrodes, a tubular dielectric spaced from the inner electrode, a casing comprising a tubular wall provided with a packing gasket forming a rest for the lower end of the dielectric, the dielectric b eing supported on said gasket with all portlons thereof free to expand and contract, and yielding means for positioning the di- ;elertric concentrally around the inner elecro e.

of a tubular inner electrode, a tubular diouter electrode on the dielectric, a casing 12a comPrising a tubular Wall provided with.y rest for the lower end of the dielectric,t:le'

dielectric being supported on said restfwitli;

all portions rthereof free toexpand a'ndfcon`- tract, and yielding-means between said Wall 13@ will and the outer electrode for positioning the dielectric concentrically around the inner electrode.

11. ln an ozone generator, the Ycombination of tubular inner and outer electrodes, a

.outer electrode and the wall', for positioning the outer electrodeV coneentrically around the inner electrode. l

I 12. vln an'ozone generator, the combination of Van inner tubular electrode, a tubular dielectric spaced from the inner electrode and haring an outer electrode onits outer periph@ cry, a casing comprising a tubular body and heads it the ends of the body provided with air ducts leading to and from the polar space between the dielectric and the inner electrode, and tubular insulators open at both ends and secu red to the ends of the inner electrode and extending through said heads to the. outside ot the casingfto permit air to pass directly througll said casing and the inner electrode.

13. ln an ozone generator, the combination of an inner tubular electrode, a tubular dielectric spaced from the inner electrode and having an outer electrode n its outer periphcry, a casing comprising a tubular body and heads at the ends of the body provided With` air ducts leading to and from the polar 'space between the dielectric and the inner electrode, tubular insulators secured to the ends of the inner electrode and extending through said heads to the outside of the casing, one of said heads having an opening through which the dielectric is endwise removable, and a reA movable cap for said opening.

14. ln an ozone generator,the combination of an inner tubular electrode', a tubular di' electric spaced from the inner elect-rodeandhaving an outer electrode on its outer periphery, a casing comprisinga tubularbodyand heads at the ends of the body provided Witlt air ducts leading to and from the/polar space rbetween the dielectric and the inner electrode,

v tubular insulators secured to the ends of the inner electrode, one ofsaid Vheads having an opening through which the dielectric is' endv :leemos the tubular body, a tube between the rings vforming a water jacket around the body and packings between .the rings and the ends of the tube, and adjustable glands onthe tube 4for said packmgs.

to and from the polar space, rings secured on the tubular body, a tube between the rings forming a water jacket around the body and Ypackings between the rings and the ends of the ltube,'adjustable glands on the tube for said packings, screws between the rings and the caps respectively, and tie bolts between the rings. Signed at Chicago, illinois, this 11th day of February, 1930;

" FRANK E. HARTMAN.

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